Geochemistry and origin of the Archaean Beit Bridge complex, Limpopo Belt, South Africa

M. Boryta, K. C. Condie

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

The Beit Bridge complex (BBC) in the Central Zone of the Limpopo Belt includes metasedimentary rocks of Archaean age, amphibolites and granitoids which comprise ≥50% of the complex. BBC metapelites have negative Eu anomalies and other immobile element distributions similar to Phanerozoic shales. One group of metapelites that shows significant depletion in Ca, Na and Sr appears to have been derived from intensely weathered sources. The negative Eu anomalies in BBC metapelites suggest intracrustal melting of their sources and thus the presence of evolved continental crust in this part of Southern Africa by about 3000 Ma. BBC banded iron formation (BIF) is similar to other Archaean BIF and shows large positive Eu anomalies. BBC carbonates are dolostones depleted in REE, HFS elements, U, Th, Ba, Sr, Ni, Se, V and Y and enriched in Fe, Mn, Na, Rb and Cs relative to Phanerozoic marine carbonates. -from Authors

Original languageEnglish
Pages (from-to)229-239
Number of pages11
JournalJournal - Geological Society (London)
Volume147
Issue number2
Publication statusPublished - 1990
Externally publishedYes

Fingerprint

Dive into the research topics of 'Geochemistry and origin of the Archaean Beit Bridge complex, Limpopo Belt, South Africa'. Together they form a unique fingerprint.

Cite this